Current Carnegie Mellon News and Events

Current Carnegie Mellon News and Events, Carnegie Mellon News Articles.
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Should Uber and Lyft be electrifying more vehicles?
Increases in air pollution and greenhouse gas emissions caused by ridesourcing impact human health and the environment--what happens when companies shoulder that cost? (2021-02-19)

AI may mistake chess discussions as racist talk
'The Queen's Gambit,' the recent TV mini-series about a chess master, may have stirred increased interest in chess, but a word to the wise: social media talk about game-piece colors could lead to misunderstandings, at least for hate-speech detection software. (2021-02-18)

FRESH 3D-printing platform paves way for tissues, organs
Research into 3D bioprinting has grown rapidly in recent years as scientists seek to re-create the structure and function of complex biological systems from human tissues to entire organs. In APL Bioengineering, researchers from Carnegie Mellon University provide perspective on the Freefrom Reversible Embedding of Suspended Hydrogels 3D bioprinting approach, which solves the issue of gravity and distortion by printing within a yield-stress support bath that holds the bioinks in place until they are cured. (2021-02-16)

Reserve prices under scarcity conditions improve with a dynamic ORDC, new research finds
A new paper quantifies how better accounting for the temperature-dependent probability of large generator contingencies with time-varying dynamic ORDC construction improves reserve procurement. The paper, 'Dynamic Operating Reserve Procurement Improves Scarcity Pricing in PJM,' by researchers at Carnegie Mellon University, was published in Energy Policy. (2021-02-16)

Switching to firm contracts may prevent natural gas fuel shortages at US power plants
New research now indicates that these fuel shortages are not due to failures of pipelines and that in certain areas of the country a change in how gas is purchased can significantly reduce generator outages. The paper, 'What Causes Natural Gas Fuel Shortages at US Power Plants?' by researchers at Carnegie Mellon University and the North American Electric Reliability Corporation, was published in Energy Policy. (2021-02-16)

Electric transmission operators could benefit from temperature-dependent resource adequacy modeling
A new paper contributes to these ongoing reliability considerations by using a unique data set to determine how both low and high temperatures reduce the reliability of coal, gas, diesel, hydroelectric, and nuclear power generators and thus affect the amount of generation markets should contract for. The paper, ''Resource Adequacy Implications of Temperature-dependent Electric Generator Availability,'' by researchers at Carnegie Mellon University, was published in Applied Energy. (2021-02-12)

A plant's nutrient-sensing abilities can modulate its response to environmental stress
Understanding how plants respond to stressful environmental conditions is crucial to developing effective strategies for protecting important agricultural crops from a changing climate. New research led by Carnegie's Zhiyong Wang, Shouling, Xu, and Yang Bi reveals an important process by which plants switch between amplified and dampened stress responses. (2021-02-11)

Astronomers confirm solar system's most distant known object is indeed Farfarout
With the help of the international Gemini Observatory, a Program of NSF's NOIRLab, and other ground-based telescopes, astronomers have confirmed that a faint object discovered in 2018 and nicknamed ''Farfarout'' is indeed the most distant object yet found in our Solar System. The object has just received its designation from the International Astronomical Union. (2021-02-11)

The politics of synonyms
A team of researchers at Carnegie Mellon University found people are more successful at identifying language associated with Republican speech than Democratic speech patterns. The results are available in the February issue of the journal PLOS. (2021-02-11)

Origami powered by light
Some man-made materials can mimic plants' slow but steady reaction to light energy, usually triggered by lasers or focused ambient light. New research from the University of Pittsburgh and Carnegie Mellon University has discovered a way to speed up this effect enough that its performance can compete against electrical and pneumatic systems. (2021-02-10)

Mobile game that uses implicit learning improved children's short-term food choices
A new study examined how Indian 10- and 11-year-olds' food choices were affected by playing a pediatric dietary mobile game that uses implicit learning--educating players without making them aware of the lessons through innovations in neurocognitive training and immersive technology. The study found that the game significantly improved children's food choices immediately after play. (2021-02-10)

COVID-related depression linked to reduced physical activity
New research from Carnegie Mellon University, University of Pittsburgh and University of California, San Diego found that 61% of surveyed university students were at risk of clinical depression, a value twice the rate prior to the pandemic. This rise in depression came alongside dramatic shifts in lifestyle habits. (2021-02-10)

Super-Earth atmospheres probed at Sandia's Z machine
Sandia National Laboratorie' Z machine has replicated the gravitational pressures on so-called ''super-Earths'' to determine which might maintain atmospheres that could support life. Astronomers believe that super-Earths -- collections of rocks up to eight times larger than Earth -- exist in the millions in our galaxy. ''The question before us is whether any of these super planets are actually Earthlike, with active geological processes, atmospheres and magnetic fields,'' said Sandia physicist Joshua Townsend. The researchers found seven. (2021-02-09)

Making good decisions about COVID-19
In their article, Rode and Fischbeck note that many of the key decisions facing individuals, corporations and governments all depend on two basic values: the probability a person has the virus and the probability that person transmits the virus. (2021-02-09)

Can super-Earth interior dynamics set the table for habitability?
New research led by Carnegie's Yingwei Fei provides a framework for understanding the interiors of super-Earths--rocky exoplanets between 1.5 and 2 times the size of our home planet--which is a prerequisite to assess their potential for habitability. Planets of this size are among the most abundant in exoplanetary systems. (2021-02-09)

Rescheduling drugs to lower risk of abuse can reduce use, dangers
A new study examined lessons from past efforts worldwide to schedule and reschedule drugs to identify general patterns and found that rescheduling drugs can lower use as well as the dangers associated with the drug. The findings have implications for policy. (2021-02-03)

Don't let pressure of one-upmanship dictate your gift selection
Researchers from Carnegie Mellon's Tepper School of Business and West Virginia University's John Chambers College of Business and Economics set out to understand gift giving dynamics in these settings and how a giver's and a recipient's evaluation of the giver's gift is influenced by the other gifts the recipient receives. (2021-02-01)

Islands without structure inside metal alloys could lead to tougher materials
An international team of researchers produced islands of amorphous, non-crystalline material inside a class of new metal alloys known as high-entropy alloys. This discovery opens the door to applications in everything from landing gears, to pipelines, to automobiles. The new materials could make these lighter, safer, and more energy efficient. (2021-01-29)

By changing their shape, some bacteria can grow more resilient to antibiotics
New research led by Carnegie Mellon University Assistant Professor of Physics Shiladitya Banerjee demonstrates how certain types of bacteria can adapt to long-term exposure to antibiotics by changing their shape. (2021-01-29)

Risk analysis helps contend with uncertainty of in-person activities
People now have access to better real-time information about COVID-19 infection and transmission rates, but they still have to decide what is safe to do. A new model co-authored by mathematician John McCarthy at Washington University in St. Louis helps to contend with the uncertainty. (2021-01-28)

"Smiling eyes" may not signify true happiness after all
A smile that lifts the cheeks and crinkles the eyes is thought by many to be truly genuine. But new research at Carnegie Mellon University casts doubt on whether this joyful facial expression necessarily tells others how a person really feels inside. (2021-01-20)

Boomerang performance is on par with internal employees who never left the firm, new paper finds
A new paper contrasts the outcomes for boomerang employees with those of internally promoted employees to help firms determine whether to invest in talent management strategies that include boomerang rehiring or to focus on internal strategies that develop current employees. (2021-01-12)

Detecting COVID-19 antibodies in 10-12 seconds
Researchers at Carnegie Mellon University report findings on an advanced nanomaterial-based biosensing platform that detects, within seconds, antibodies specific to SARS-CoV-2, the virus responsible for the COVID-19 pandemic. In addition to testing, the platform will help to quantify patient immunological response to the new vaccines with precision. (2021-01-08)

A brain mechanism underlying 'vision' in the blind is revealed
Researchers observed slow spontaneous fluctuations in the brain's visual centers that preceded visual hallucinations in blind people. (2021-01-07)

When Uber and Lyft enter cities, vehicle ownership increases
When ridesourcing companies Uber and Lyft show up in urban areas, vehicle registrations per capita increase by 0.7% on average, increasing even more in car-dependent cities. Researchers made this discovery by analyzing data from major US cities between 2011 to 2017, comparing trends in cities where Uber and Lyft entered with those where they didn't. They also found that Uber and Lyft displace transit more in cities with higher income and fewer children. (2021-01-06)

CRISPR helps researchers uncover how corals adjust to warming oceans
The CRISPR/Cas9 genome editing system can help scientists understand, and possibly improve, how corals respond to the environmental stresses of climate change. Work led by Phillip Cleves--who joined Carnegie's Department of Embryology this fall--details how the revolutionary, Nobel Prize-winning technology can be deployed to guide conservation efforts for fragile reef ecosystems. (2020-12-21)

Scientists and philosopher team up, propose a new way to categorize minerals
Minerals are the most durable, information-rich objects we can study to understand our planet's origin and evolution. However, the current classification system leaves unanswered questions for planetary scientists, geobiologists, paleontologists and others who strive to understand minerals' historical context. A new evolutionary approach to classifying minerals complements the existing protocols and offers the opportunity to rigorously document Earth's history. (2020-12-21)

Infrastructure key to balancing climate and economic goals in developing countries
Developing nations have an opportunity to avoid long-term dependence on fossil fuel-burning infrastructure as they move toward economic stability, even if they are slow to cut carbon emissions, say the authors of a new paper. Countries with low per capita incomes can keep their contributions to global warming to 0.3 degrees Celsius with careful foresight and planning, urge Carnegie's Lei Duan and Ken Caldeira with Juan Moreno-Cruz of the University of Waterloo. (2020-12-16)

Most-distant galaxy helps elucidate the early universe
New work from an international team of astronomers improves our understanding of the most-distant known astrophysical object-- GN-z11, a galaxy 13.4 billion light-years from Earth. (2020-12-16)

Carbon capture's next top model
Creating accurate, detailed models is key to scaling up carbon capture technology. A recent paper led by the University of Pittsburgh Swanson School of Engineering examines and compares the various modeling approaches for hollow fiber membrane contactors (HFMCs), a type of carbon capture technology. The group analyzed over 150 cited studies of multiple modeling approaches to help researchers choose the technique best suited to their research. (2020-12-16)

Balancing climate and development goals
The impact on climate change would only be modest if countries in the process of development were to delay efforts to reduce their carbon emissions until they reach a certain level of economic growth. (2020-12-15)

Behavioral strategies to promote a national COVID-19 vaccine program
National efforts to develop a coronavirus disease 2019 (COVID-19) vaccine at 'warp speed' will likely yield a safe and effective vaccine by early 2021. However, this important milestone is only the first step in an equally important challenge: getting a majority of the U.S. public vaccinated. (2020-12-14)

Two related discoveries advance basic and applied additive manufacturing research
A research team led by Tao Sun, associate professor of materials science and engineering at the University of Virginia, has made two discoveries that can expand additive manufacturing in aerospace and other industries that rely on strong metal parts. (2020-12-07)

Caribbean coral reefs under siege from aggressive algae
Human activity endangers coral health around the world. A new algal threat is taking advantage of coral's already precarious situation in the Caribbean and making it even harder for reef ecosystems to grow. Just-published research details how an aggressive, golden-brown, crust-like alga is rapidly overgrowing shallow reefs, taking the place of coral that was damaged by extreme storms and exacerbating the damage caused by ocean acidification, disease, pollution, and bleaching. (2020-11-30)

A route for avoiding defects during additive manufacturing
Research published in Science reveals how pores form during metals additive manufacturing and become defects trapped in solidifying metal. The practical value of this research is that it can inform industry on how to predict and improve 3D printing processes. (2020-11-26)

New technique isolates brain cells associated with Parkinson's disease
Carnegie Mellon University researchers have developed a new technique for isolating a type of brain cell associated with Parkinson's disease symptoms, enabling them to study that cell type in detail. (2020-11-16)

Cynical hostility presents a potential pathway to cardiovascular disease
Cynical hostility is a potential pathway to cardiovascular disease by preventing a healthy response to stress over time, according to a Baylor University study. (2020-11-16)

New technique extends next-generation lithium metal batteries
Columbia Engineering researchers have found that alkali metal additives, such as potassium ions, can prevent lithium microstructure proliferation during battery use. They used a combination of microscopy, nuclear magnetic resonance, and computational modeling to discover that adding small amounts of potassium salt to a conventional lithium battery electrolyte produces unique chemistry at the lithium/electrolyte interface, and modulates degradation during battery operation, preventing the growth of microstructures and leading to safer, longer lasting batteries. (2020-11-04)

New decision support tool can provide personalized antibiotic treatment recommendations
A new study led by researchers at the Harvard Pilgrim Health Care Institute developed an algorithm that could greatly reduce use of broad-spectrum antibiotics in outpatient settings, a step toward reducing antibiotic resistance. The findings will be published online November 4, 2020 in Science Translational Medicine. (2020-11-04)

First light on a next-gen astronomical survey toward a new understanding of the cosmos
The Sloan Digital Sky Survey's fifth generation collected its very first observations of the cosmos at 1:47 a.m. on October 24, 2020. As the world's first all-sky time-domain spectroscopic survey, SDSS-V will provide groundbreaking insight into the formation and evolution of galaxies--like like our own Milky Way--and of the supermassive black holes that lurk at their centers. (2020-11-02)

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