Tag

False Positives

All articles tagged with #false positives

world-news23 days ago•82 min saved

Colombia’s presidential race haunted by fear of returning to decades of violence

Colombia’s presidential contest is dominated by fear of a relapse into the country’s long war, as candidates propose divergent security approaches—one favoring tough state action and peacemaking with criminal groups, the other pushing a hardline crackdown. Survivors recount the toll of past abuses, including the “false positives” killings and kidnappings, while ongoing violence and a partial ceasefire among armed groups underscore concerns that peace gains could unravel with a change in leadership.

via AP News|

#colombia #colombia-elections #false-positives

security2 months ago•4 min saved

Microsoft Defender flags DigiCert root certificates as malware, triggering trust disruptions

Microsoft Defender's late-April signature update falsely flagged DigiCert root certificates as malware, causing removals from the Windows trust store and disruptions to secure connections; Microsoft issued emergency Defender definitions (1.449.430.0 and 1.449.431.0) to fix the issue and auto-restore certificates. While timing touches a DigiCert breach incident, Defender targeted root certificates, not EV signing certs, underscoring the risk of false positives in automated threat detection and the need for layered security.

via LinkedIn|

#certificates #digicert #false-positives

technology2 months ago•5 min saved

Defender mislabels DigiCert roots as malware, prompting trust-store removals

Microsoft Defender’s signature update incorrectly flagged legitimate DigiCert root certificates in the Windows AuthRoot store as Trojan:Win32/Cerdigent.A!dha, leading to removals; Microsoft fixed the false positives in Security Intelligence updates 1.449.430.0 and 1.449.431.0, with automatic updates rolling out and manual checks available. The DigiCert breach is being discussed as a possible link, though the Defender flags target root certificates rather than the revoked EV code-signing certificates linked to DigiCert’s incident.

via BleepingComputer|

#digicert-breach #false-positives #microsoft-defender

science3 months ago•4 min saved

Glove Residues May Skew Microplastic Measurements, U-M Researchers Find

A University of Michigan study shows nitrile and latex gloves shed stearates that resemble microplastics and can cause about 2,000 false positives per square millimeter in measurements. Cleanroom gloves release far fewer particulates, reducing contamination, and the team developed methods to distinguish glove-derived contaminants from true microplastics, enabling researchers to revisit affected datasets.

via University of Michigan News|

#false-positives #gloves #lab-contamination

science4 months ago•6 min saved

Multi-Cancer Blood Tests Spark Hope, but Evidence Is Still Lacking

Blood tests that search for multiple cancers by detecting circulating tumor DNA promise early detection, but a large UK trial showed many cancers were missed and negative results can give false reassurance; plus costs and false positives could strain health services. Traditional screening remains the proven approach for reducing deaths, though these tests may have a role in high‑risk groups or post‑treatment monitoring. They are not a magic bullet, and symptoms should still prompt medical advice; participate in trials or seek clear interpretation if such tests are offered privately.

via ScienceAlert|

#blood-test #cancer #early-detection

health-and-medicine5 months ago•3 min saved

New debate questions how solid the evidence is for microplastics in human tissues

A growing critique argues that many studies claiming microplastics in human bodies may be flawed, due to Py-GC-MS measurement flaws that can mistake tissue fats for plastics, and inadequate contamination controls. Critics point to 18 papers with questionable methods, highlighting that the field is nascent and that hard proof of health impacts is still lacking, though the possibility of plastics in humans isn’t fully ruled out.

via Futurism|

#brain #contamination #false-positives

science5 months ago•11 min saved

Microplastics in humans: a cautious take on the hype vs. science

A Guardian briefing questions sensational claims of large amounts of microplastics in the human body, highlighting measurement challenges and potential false positives in early studies. While microplastics are pervasive environmentally, the exact levels in people remain uncertain and methods are still being refined; the health risks are not yet clear, but the broader case for cutting plastic pollution remains strong.

via The Guardian|

#false-positives #human-body #measurement-challenges

environment5 months ago•36 min saved

Doubts Mount Over Evidence of Microplastics in Humans

Scientists are questioning the reliability of studies that detect microplastics in human tissues, citing contamination risks and flawed methods that could inflate results. A Guardian report and reviews of thousands of papers highlight potentially problematic studies, fueling calls for improved methodologies before drawing health conclusions or guiding policy.

via Ground News|

#contamination #environment #false-positives

health6 months ago•7 min saved

Advances in Blood Tests Promise Early Detection and Improved Cancer Outcomes

New blood tests capable of detecting multiple cancers simultaneously show promise for earlier diagnosis and improved cancer care, but currently face challenges such as high false-positive rates, lack of standardization, and integration into clinical practice. Experts believe these tests will improve over time and could revolutionize cancer diagnostics, though more research and validation are needed.

via Live Science|

#cancer-detection #early-diagnosis #false-positives

health1 year ago•3 min saved

Debate Over Prostate Cancer Testing Methods and Efficacy

The article discusses the pros and cons of PSA testing for prostate cancer, emphasizing that while it can produce false positives leading to unnecessary procedures, careful testing and risk assessment can help identify high-risk cases and save lives. The author supports PSA screening for men aged 50-70 and suggests that digital rectal exams add little value and often result in false positives, but individual discussions with doctors are important.

via OregonLive.com|

#dre #false-positives #health

science1 year ago•3 min saved

DNA Tests Show Bias in Accuracy Across Different Ethnicities

A University of Oregon study highlights the limitations of forensic DNA analysis, particularly when dealing with DNA mixtures from groups with low genetic diversity. The research found that such mixtures are more prone to false positives, potentially implicating innocent individuals. This issue is exacerbated when more contributors are involved. The study underscores the importance of understanding the technique's limitations and the ethical challenges in genetic research, especially regarding informed consent.

via University of Oregon|

#dna-analysis #ethical-research #false-positives

health2 years ago•4 min saved

Doctors Advise Against Costly $1,000 Cancer Blood Tests

Top doctors are cautioning against $1,000 multi-cancer detection blood tests, citing insufficient evidence and the risk of false positives leading to unnecessary procedures. While early studies show promise, experts recommend sticking to regular screenings until more research validates these tests' efficacy and safety.

via Daily Mail|

#blood-tests #cancer #early-detection

science-and-technology2 years ago•3 min saved

"Star Trek's Planet Vulcan Proven to Be an Astronomical Illusion"

Astronomers have confirmed that the signals previously thought to indicate the existence of a planet orbiting the star 40 Eridani A, known as Vulcan in Star Trek, were false positives caused by the star's own activity. This finding underscores the importance of advanced tools in accurately identifying exoplanets and ruling out false signals.

via ScienceAlert|

#astronomy #exoplanets #false-positives

healthcare2 years ago•1 min saved

Revolutionary $1K Blood Test Disrupts Cancer Treatment

Grail's Galleri test, a multicancer early detection test that screens for over 50 types of cancer, is gaining popularity among wealthy patients despite concerns from some doctors. The $949 test, not covered by most insurance plans, has shown potential in early detection but has also raised red flags due to a significant number of false positives and false negatives. The test is not yet FDA-approved, and the American Academy of Family Physicians does not recommend mass screenings. Additionally, a recent software error resulted in false negative reports being sent to customers. Grail is working on independent studies to track its accuracy and seeking wider insurance coverage.

via Newser|

#cancer-screening #false-negatives #false-positives

technology2 years ago•2 min saved

AI Writing Detectors Fail to Distinguish Between Human and AI Authors

OpenAI confirms that AI writing detectors, including their own discontinued AI Classifier, do not reliably distinguish between AI-generated and human-generated content. These detectors often yield false positives and can be defeated by rephrasing. OpenAI also clarifies that ChatGPT itself cannot determine if text is AI-written or not and warns about the model's propensity to confabulate false information. While humans can sometimes detect AI writing through changes in style or tell-tale signs, it is safest to avoid automated AI detection tools as they have high false positive rates.

via Ars Technica|

#ai-writing-detectors #chatgpt #false-positives