Researchers estimate that about 70 – 80 % of Yemenis between 16 and 50 years old chew khat, at least on occasion, and it has been estimated that Yemenis spend about 14. 6 million person-hours per day chewing khat.

Researchers estimate that anywhere from a third to half of the world's human population carry a Toxoplasma infection.

Researchers at the University of Alaska Fairbanks, United States estimate that a network of such lines, combined with coastal wind turbines, could substantially reduce rural Alaska ’ s dependence on increasingly expensive diesel fuel for power generation.

Researchers theorize that empathic emotions, or those relating to the emotions of others, arose due to reciprocal altruism, mother-child bonding, and the need to accurately estimate the future actions of conspecifics.

Researchers estimate the bycatch of young red snapper, especially by shrimp trawlers, is a significant concern.

Researchers estimate that the prehistoric marsupial first appeared about 15 million years ago and died out about 12 million years ago, perhaps from climate change induced losses in habitat.

Researchers estimate that between 2 and 3 million slaves were exported out of this region and were traded for goods like alcohol and tobacco from the Americas and textiles from Europe.

* Researchers estimate that sometime in the 1930s a form of simian immunodeficiency virus, SIV, jumped to humans in central Africa.

Researchers estimate 597 Mexicans were lynched between 1848 and 1928.

Researchers estimate the extent of old growth in the forest is.

“ Researchers have posited many ideas about why cohabitation has increased in the United States and how the beliefs or opinions of others might affect one ’ s decision to cohabit.

Researchers at the University of Massachusetts Amherst have identified Sunoco as the 55th-largest corporate producer of air pollution in the United States, with roughly 1. 7 million pounds of toxic chemicals released annually into the air.

Researchers at the University of Massachusetts Amherst have identified Weyerhaeuser as the 63rd-largest corporate producer of air pollution in the United States, with roughly 17. 5 million pounds of toxic air released annually into the air.

Researchers at the United States Department of Agriculture ( USDA ) have patented a method of removing the stiff quill from the fibers which make up the feather.

Researchers at the University of Massachusetts Amherst have identified Temple – Inland as the 24th-largest corporate producer of air pollution in the United States in 2002.

Researchers at the Political Economy Research Institute have ranked U. S. Steel as the eighth-greatest corporate producer of air pollution in the United States ( down from their 2000 ranking as the second-greatest ).

Researchers at the University of Massachusetts Amherst have identified Reliant Energy as the 36th-largest corporate producer of air pollution in the United States, with roughly 34 million pounds of toxic chemicals released into the air every year.

Researchers at the University of Massachusetts Amherst have identified Phelps Dodge as the 23rd-largest corporate producer of air pollution in the United States, with roughly 3. 64 million pounds of toxins released annually into the air.

Program and the Visiting Researchers Program at Yale Law are amongst the smallest and most selective graduate law programs in the United States.

Researchers have attempted to explain the assimilation rate for post 1965 immigrants in the United States with experiences of immigrants who entered the United States between 1880 and 1920.

Researchers studied dozens of soil and vapour samples from five different desert environments in Utah, Idaho and California in the United States, and in Canada and Chile.

Researchers in France, Sweden, and the United States were struck by how similar these children looked, though they were not related, and how they behaved in the same unfocused and hyperactive manner.

Researchers discovered that only the Mississippi River received more toxic materials than the Connoquenessing, making the small river the second most polluted waterway in the United States.

Researchers at Harvard University, the United States Geological Survey ( USGS ), and several other institutions attempted unsuccessfully to synthesize coffinite in the mid-1950s after its initial discovery.

Researchers at the University of Massachusetts Amherst have identified Textron as the 60th-largest corporate producer of air pollution in the United States, with roughly 600, 000 pounds of toxic chemicals released annually into the air.

Researchers at the University of Massachusetts Amherst have identified Progress Energy as the 29th-largest corporate producer of air pollution in the United States in 2002, when it released roughly 39 million pounds of toxic chemicals into the air.

Researchers at the University of Massachusetts Amherst have identified PSEG as the 48th-largest corporate producer of air pollution in the United States, with roughly five million pounds of toxic chemicals released annually into the air.

Researchers at the University of Massachusetts Amherst have identified Emerson as the 97th largest corporate producer of air pollution in the United States, down from its previous rank of 56th.

Researchers at the University of Massachusetts Amherst recently listed Allegheny Technologies as the 26th-largest corporate producer of air pollution in the United States, with approximately of toxic chemicals released annually into the air.

Researchers spent almost three years locating survivors of D-Day and over 3000 interviews were undertaken in the United States, Canada, Great Britain, France and Germany.

Researchers at the University of Massachusetts Amherst have identified TECO Energy as the 37th-largest corporate producer of air pollution in the United States, with roughly 11 million pounds of toxic chemicals released annually into the air.

Researchers at the University of Massachusetts Amherst identified Mirant as the 63rd-largest corporate producer of air pollution in the United States, based on 2002 data, with roughly 19 million pounds of toxic chemicals released annually into the air.

Researchers at the University of California, Berkeley ( especially Daniel McFadden, who won a " Nobel " Prize in Economics for his efforts ) and the Massachusetts Institute of Technology ( Moshe Ben-Akiva ) ( and in MIT associated consulting firms, especially Cambridge Systematics ) developed what has become known as choice models, direct demand models ( DDM ), Random Utility Models ( RUM ) or, in its most used form, the multinomial logit model ( MNL ).

Researchers believe that environmental ( socioeconomic and cultural ) factors contribute to this, but have not agreed on whether the gaps are due to environmental factors alone, or whether there is any genetic contribution that can be substantiated.

Researchers indicate that even with significant clinical experience, it is difficult to reliably identify William syndrome based on facial features alone.

* Researchers from the New York State Department of Health and State University of New York in Albany demonstrate a device which allows people to interface with a computer through thought alone.

Researchers at University of Virginia Health Sciences Center have developed a psychoeducational program that helps patients identify their blood glucose symptoms more accurately, better predict when hypoglycemia is more likely to occur, and then treat hypoglycemia earlier than they might if they were relying exclusively on blunted autonomic symptoms alone.

Researchers spent more than three months during the 2007-08 field season installing an array of seismometers around Mount Erebus to listen to waves of energy generated by small, controlled blasts from explosives they buried along its flanks and perimeter.

Researchers at the US Department of Energy's Lawrence Berkeley National Laboratory ( Berkeley Lab ) have developed a piezoelectric generator sufficient to operate a liquid crystal display using thin films of M13 bacteriophage.

Researchers and theorists are likely to be identified in the US and Canada as educational psychologists, whereas practitioners in schools or school-related settings are identified as school psychologists.

Researchers at the Massachusetts General Hospital in Boston, US, say that if eggs are newly created each month in humans as well, all current theories about the aging of the female reproductive system will have to be overhauled, although at this time this is simply conjecture.

Researchers in the US led by Prof. Jerry Mendell have published the results of a gene therapy trial for limb girdle muscular dystrophy type 2D ( LGMD2D ).

Researchers discovered that in just one year, Koobface generated over US $ 2million in profits.

Researchers participating in a clinical trial must report all adverse events to the drug regulatory authority of the respective country where the drug or device is to be registered Food and Drug Administration ( FDA ) if it is US.

Researchers found evidence that significant deviations from CIRP during the onset of the global financial crisis in 2007 and 2008 were driven by concerns over risk posed by counter parties to banks and financial institutions in Europe and the US in the foreign exchange swap market.