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Download American Scientist (May/June 2016) PDF

Review: American Scientist journal is an illustrated bimonthly journal approximately technology and expertise. every one factor is full of function articles written through admired scientists and engineers, reviewing very important paintings in fields that diversity from molecular biology to laptop engineering. The articles are rigorously edited and observed through illustrations which are built to augment the reader's realizing and enjoyment.

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Commercial service attacks. Wireless networks. transactions. Data repositories and breaches. Cloud platforms. Portable apps and scripts. Massive Internet fraud. Web-based data breaches. attacks. Social engineer- Ransomware. Malicious ing and phishing attacks. adware. Internet of Things. Surveillance. Peer-to-peer (P2P) Cyber warfare. networks. 1980s 1990s 2000s Malware detection (antivirus) Virtual private networks (VPNs) Cryptographic hashes Intrusion detection Security verification Firewalls Public-key infrastructure (PKI) Secure coding and development processes Secure web connections (SSL/TLS) Biometrics 2-factor authentication Confinement (virtual machines, sandboxes) China has been implicated in numerous breaches.

And there are fugitive methane emissions at the wellhead and in the midstream sectors. So, depending on the evolution of future energy demands, a natural gas future has the potential to offset its current carbon benefits. Researchers and technologists have been testing carbon capture and storage technologies, along with the practicality of coupling this technology with coal and natural gas facilities. Doing so would greatly ameliorate carbon emissions, but it could also more than double the water intensity of electricity generation, because the process by which carbon is captured is energy intensive, requiring even more cooling water.

Conveying water across flat land requires very little power, and water flowing downhill can generate power, but moving water upward— either from the ground or over mountains—demands a lot of energy. Although the energy penalty of groundwater withdrawals may seem trivial, the costs add up. As mentioned earlier, a case in point is California. 7 billion during recent dry years are not solely the result of crop losses; over 20 percent of that cost is due to added spending on the electricity needed to pump more groundwater as surface water supplies diminish.

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