Results 21 to 30 of about 1,433,653 (343)
Malthusianism of the 21st century
This paper has arisen from a reflection of the current reality in terms of the postulations about what is known as the Malthusian economy. Since the Industrial Revolution to the present day, despite there having been a high increase in world population, technology has played a fundamental role in the increase in the level of wealth per capita. However,
Montaño, Borja, García-López, Marcos
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Measles in the 21st Century [PDF]
Between 2000 and 2008, measles control improved markedly worldwide, but with poorer countries focused on polio eradication and some richer countries falling prey to opposition to vaccination, the measles genie seems to have slipped out of the bottle in recent years.
Ulla K. Griffiths+2 more
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Accelerators in the 21st Century [PDF]
More than 30,000 accelerators are in operation worldwide. Of these less than 1% are devoted to basic research. Prominent among the latter are high-energy particle colliders - powerful engines of discovery and precision measurement, which have played an essential role in establishing the standard model of particle physics.
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Design of a 3 GHz fine resolution LC DCO [PDF]
In this thesis, the design of a fine resolution LC digitally controlled oscillator (DCO) is introduced. Two NMOS varactor banks are used to achieve 12 bits medium and fine frequency tuning.
Zhao, Xuming, active 21st century
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Assessment of zonal isolation risk to changes in design parameters [PDF]
The Well Containment Screening Tool (WCST) focuses on well integrity evaluation after well control incident. The WCST favors a greater wall thickness and, hence, a narrower cementing annulus, potentially increasing the risk of cement loss.
Zhang, Huidong, active 21st century
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Virology in the 21st Century [PDF]
The editors of the Journal of Virology are in a privileged position to observe our field grow and develop. While the rational prediction of things to come is based on extrapolation of what we know now, we cannot anticipate the surprises that result from the serendipity of research.
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The tumor-promoting functions of Ataxia-telangiectasia mutated (ATM) in cancer cells [PDF]
textAtaxia-telangiectasia mutated (ATM) protein kinase regulates the DNA damage response (DDR) and is associated with cancer suppression by protecting cells from DNA double-strand breaks (DSBs). However, how ATM functions outside of DSB signaling is less
Chen, Wei-Ta, active 21st century
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AbstractIn the last century, vaccination has been the most effective medical intervention to reduce death and morbidity caused by infectious diseases. It is believed that vaccines save at least 2–3 million lives per year worldwide. Smallpox has been eradicated and polio has almost disappeared worldwide through global vaccine campaigns.
Isabel Delany+2 more
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Peridynamic model of poroelasticity based on Hamilton's principle [PDF]
Porous media theories play an important role in many branches of engineering. Despite significant advances, the existing theories suffer from many limitations and drawbacks when dealing with problems with discontinuities like fractures.
Xu, Xiao, active 21st century
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Tyrosine kinase inhibitors are the first-line treatment for Anaplastic Lymphoma Kinase-positive lung adenocarcinomas. However, chemotherapy is still an option in patients who are unresponsive or intolerant of tyrosine kinase inhibitors.
Oranus Mohammadi+2 more
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