
AI Is Fast-Tracking Climate Research, From Weather Forecasts to Sardines
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Artificial intelligence is giving some climate research projects a much-needed boost at a time of worsening extreme weather and funding cuts that threaten science in the US and elsewhere.
While generative AI faces criticism due to the large amounts of power required to train and run sophisticated models, it also holds the promise of advancing science.
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Weighted Vests: Are They Effective for Weight Loss?
With the ongoing obesity epidemic, researchers are constantly looking for strategies that optimize weight loss while minimizing associated side effects. One strategy currently gaining interest is the use of weighted vests— form-fitting garments into which weights are sewn or carried in pockets, enabling the wearer to add or remove them as needed. In theory, this offers a nonpharmacologic way to induce weight loss without the side effects of medications or weight-loss surgery, but with potential bone-sparing effects. The latter is important because even modest weight loss can reduce bone density and strength, increasing the risk for fracture. Weight loss — particularly when induced by caloric restriction — is associated with bone loss, especially at the hip. This is a consequence of loss of muscle mass and an unloading of bones from the decrease in body weight. Even modest diet-induced weight loss results in small but significant reductions in hip bone mineral density (BMD), with less consistent changes at the spine or whole body. These skeletal losses may increase fracture risk, particularly in older adults, and are more pronounced when weight loss occurs in the absence of exercise. Resistance training or combined aerobic-resistance exercise mitigate but do not fully prevent this bone loss. How Do Weighted Vests Help? Weighted vests can be used to preserve muscle mass during periods of caloric restriction. This is achieved by increasing gravitational loading and placing mechanical stress on weight-bearing tissues. Local fat mass is theoretically reduced by the work required to wear the weighted vest. Preservation of muscle mass has the dual benefit of preserving bone mass and maintaining resting metabolic rate (RMR). This is important because weight loss typically results in a lower RMR, which makes subsequent weight loss more difficult. Although using weighted vests does not lead to the same degree of weight loss reported with GLP-1 receptor agonists such as semaglutide, or GLP-1/glucose-dependent insulinotropic peptide (GIP) receptor agonists such as tirzepatide, the data demonstrate benefits of this strategy. For example, 5 weeks of high-load vest use (11% of body weight worn 8 hours per day) vs a low-load vest (1% of body weight) reduced fat mass and waist circumference with no significant change in overall body weight. Loss of fat mass and a reduction in waist circumference are not inconsequential outcomes. Fat distribution (particularly an excess of visceral fat with an increased waist circumference) is a major driver of many metabolic morbidities associated with obesity. In fact, newer definitions of preclinical and clinical obesity emphasize body fat distribution and waist circumference, rather than absolute body weight. The impact of weighted vest use on skeletal health is inconclusive at this time. Snow and colleagues reported preservation of hip BMD over a 5-year period in older, postmenopausal women when weighted vest use was combined with jumping exercises. However, a randomized controlled study from Wake Forest University (INVEST in Obesity) involving 150 older adults with obesity did not find a bone-protective effect of weighted vest use or resistance training following intentional weight loss. Further studies are needed to evaluate the impact on BMD of varying durations of vest use and varying weights of the vest. In conclusion, studies thus far have not demonstrated a significant impact of weighted vests for total weight reduction, although reductions in local fat mass and waist circumference may confer some metabolic benefit. These vests may provide mechanical stimuli that support musculoskeletal integrity; however, further research is necessary to prove this point and data available thus far are conflicting.
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Watch SpaceX Launch Crew to ISS
SpaceX launched its Dragon capsule carrying astronauts from the US, Japan, and Russia to the ISS, after an initial scrub. Caroline Hyde and Ed Ludlow cover the launch and its technical and geopolitical significance on "Bloomberg Tech." Error while retrieving data Sign in to access your portfolio Error while retrieving data Error while retrieving data Error while retrieving data Error while retrieving data
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Federal Reserve economists aren't sold that AI will actually make workers more productive, saying it could be a one-off invention like the light bulb
A new Federal Reserve Board staff paper concludes that generative artificial intelligence (genAI) holds significant promise for boosting U.S. productivity, but cautions that its widespread economic impact will depend on how quickly and thoroughly firms integrate the technology. Titled 'Generative AI at the Crossroads: Light Bulb, Dynamo, or Microscope?' the paper, authored by Martin Neil Baily, David M. Byrne, Aidan T. Kane, and Paul E. Soto, explores whether genAI represents a fleeting innovation or a groundbreaking force akin to past general-purpose technologies (GPTs) such as electricity and the internet. The Fed economists ultimately conclude their 'modal forecast is for a noteworthy contribution of genAI to the level of labor productivity,' but caution they see a wide range of plausible outcomes, both in terms of its total contribution to making workers more productive and how quickly that could happen. To return to the light-bulb metaphor, they write that 'some inventions, such as the light bulb, temporarily raise productivity growth as adoption spreads, but the effect fades when the market is saturated; that is, the level of output per hour is permanently higher but the growth rate is not.' Here's why they regard it as an open question whether genAI may end up being a fancy tech version of the light bulb. GenAI: a tool and a catalyst According to the authors, genAI combines traits of GPTs—those that trigger cascades of innovation across sectors and continue improving over time—with features of 'inventions of methods of invention' (IMIs), which make research and development (R&D) more efficient. The authors do see potential for genAI to be a GPT like the electric dynamo, which continually sparked new business models and efficiencies, or an IMI like the compound microscope, which revolutionized scientific discovery. The Fed economists did cautioning that it is early in the technology's development, writing 'the case that generative AI is a general-purpose technology is compelling, supported by the impressive record of knock-on innovation and ongoing core innovation.' Since OpenAI launched ChatGPT in late 2022, the authors said genAI has demonstrated remarkable capabilities, from matching human performance on complex tasks to transforming frontline work in writing, coding, and customer service. That said, the authors said they're finding scant evidence about how many companies are actually using the technology. Limited but growing adoption Despite such promise, the paper stresses that most gains are so far concentrated in large corporations and digital-native industries. Surveys indicate high genAI adoption among big firms and technology-centric sectors, while small businesses and other functions lag behind. Data from job postings shows only modest growth in demand for explicit AI skills since 2017. 'The main hurdle is diffusion,' the authors write, referring to the process by which a new technology is integrated into widespread use. They note that typical productivity booms from GPTs like computers and electricity took decades to unfold as businesses restructured, invested, and developed complementary innovations. 'The share of jobs requiring AI skills is low and has moved up only modestly, suggesting that firms are taking a cautious approach,' they write. 'The ultimate test of whether genAI is a GPT will be theprofitability of genAI use at scale in a business environment and such stories are hard to come by at present.' They know that many individuals are using the technology, 'perhaps unbeknownst to their employers,' and they speculate that future use of the technology may become so routine and 'unremarkable' that companies and workers no longer know how much it's being used. Knock-on and complementary technologies The report details how genAI is already driving a wave of product and process innovation. In healthcare, AI-powered tools draft medical notes and assist with radiology. Finance firms use genAI for compliance, underwriting, and portfolio management. The energy sector uses it to optimize grid operations, and information technology is seeing multiples uses, with programmers using GitHub Copilot completing tasks 56% faster. Call center operators using conversational AI saw a 14% productivity boost as well. Meanwhile, ongoing advances in hardware, notably rapid improvements in the chips known as graphics processing units, or GPUs, suggest genAI's underlying engine is still accelerating. Patent filings related to AI technologies have surged since 2018, coinciding with the rise of the Transformer architecture—a backbone of today's large language models. 'Green shoots' in research and development The paper also finds genAI increasingly acting as an IMI, enhancing observation, analysis, communication, and organization in scientific research. Scientists now use genAI to analyze data, draft research papers, and even automate parts of the discovery process, though questions remain about the quality and originality of AI-generated output. The authors highlight growing references to AI in R&D initiatives, both in patent data and corporate earnings calls, as further evidence that genAI is gaining a foothold in the innovation ecosystem. Cautious optimism—and open questions While the prospects for a genAI-driven productivity surge are promising, the authors warn against expecting overnight transformation. The process will require significant complementary investments, organizational change, and reliable access to computational and electric power infrastructure. They also emphasize the risks of investing blindly in speculative trends—a lesson from past tech booms. 'GenAI's contribution to productivity growth will depend on the speed with which that level is attained, and historically, the process for integrating revolutionary technologies into the economy is a protracted one,' the report concludes. Despite these uncertainties, the authors believe genAI's dual role—as a transformative platform and as a method for accelerating invention—bodes well for long-term economic growth if barriers to widespread adoption can be overcome. Still, what if it's just another light bulb? For this story, Fortune used generative AI to help with an initial draft. An editor verified the accuracy of the information before publishing. This story was originally featured on Error in retrieving data Sign in to access your portfolio Error in retrieving data Error in retrieving data Error in retrieving data Error in retrieving data