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Pesticide-free farming strategies offer billions of dollars in benefits across Asia-Pacific

Pesticide-free farming strategies offer billions of dollars in benefits across Asia-Pacific

Science
Aug. 31 (UPI) -- Pesticide-free pest control strategies paid serious economic dividends throughout the Asia-Pacific region in the last century, yielding annual benefits between $ 14.6 to $ 19.5 billion across 23 countries. According to the new research, detailed Monday in the journal Nature Ecology and Evolution, non-chemical crop protection has proven far more valuable than the development of high-yield grain varieties, often referred to as the Green Revolution. Advertisement For the study, scientists examined biological efforts for 43 exotic invertebrate pests across the Asia-Pacific. The surveyed control efforts were overwhelmingly successful, resulting in between 73 and 100 percent yield loss reductions across a range of crops, including banana, breadfruit, cassava and coconut. "The G...
Mosquito courting strategies could inspire quieter drones

Mosquito courting strategies could inspire quieter drones

Science
Nov. 7 (UPI) -- The rapidly beating wings of a mosquito serve two purposes, according to a new study. The tiny blades keep mosquitoes airborne and help them locate mates. Male mosquitoes work to match their high-frequency buzz to the low-frequency hum of a female. They must carry out their courting rituals while flying through crowded airspace and tracking down their next meal. Engineers at Johns Hopkins University set out to better understand how the mosquito's wings meet the insect's aerodynamic and acoustic needs. Their analysis could be used to design quieter drones or develop chemical-free mosquito control strategies. "The same wings that are producing sound are also essential for them to fly," lead researcher Rajat Mittal, a mechanical engineering professor and expert in computatio...
Here are smart investing strategies in any market

Here are smart investing strategies in any market

Finance
If the ups and downs of the stock market have you wondering what to do, you're not alone.Stocks tanked in August, neared record highs in September and Goldman Sachs is predicting a wild ride in October.On top of that, a recent UBS survey found that 55% of the ultra-rich see a recession by 2020 and 45% are already adjusting their portfolios to prepare — including shifting to bonds and real estate.Financial behaviorist Jacquette Timmons said that uncertainty and the lack of control over the market's performance causes many people to fear investing."The other thing is trust," she said. "Can you trust yourself to do the right thing? Can you trust the professionals ... are doing the right thing?"Warren Buffett says the secret to great investing is to wait.Danielle Townauthor and investorYet, it...
Two strategies that could trap investors in losing trades right now

Two strategies that could trap investors in losing trades right now

Finance
Wilmington Trust's Meghan Shue warns snap decisions during market volatility spikes will trap investors in losing trades.According to the firm's senior investment strategist, reacting to every U.S.-China trade war development and taking on large positions are two of the worst things they can do right now."For long-term investors, to chase those headlines risks missing out on say very good days, maybe locking in some losses on the bad days and eroding your portfolio value — particularly after taxes," she told CNBC's "Futures Now" on Thursday.Shue said also going all in on stocks is a recipe for pain."The other thing that we would caution against is taking large bets in a portfolio," she added.Shue, who has almost $ 98 billion in assets under management, has been taking a neutral approach to...
New strategies for distinguishing between students who know and students who guess

New strategies for distinguishing between students who know and students who guess

Science
Dec. 28 (UPI) -- Research economists at the University of Leuven have developed new strategies for more accurately assessing the academic performance of students in online classes. According to their new paper on the subject -- published in the journal Heliyon -- there are a variety of problems with the assessments currently used for many so-called massive open online courses, or MOOCs. First, MOOC assessments generally feature too few questions. Tests featuring just 10 to 15 questions are insufficient, researchers argue. Additionally, the common use of multiple choice rewards guessing, distorting the test results. Finally, online tests used by MOOCs frequently rely on the same sets of answers, minimizing their ability to measure changes in knowledge as tests are updated. For solutions to...