检索结果-南通市图书馆

The Global Positioning System (GPS): Creating Satellite Beacons in Space, Engineers Transformed Daily Life on Earth

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第3期7卷 290-303页

作者： peter weiss 机构不详

*** In late 1990,war in the Persian Gulf loomed beyond a January deadline for lraq to pull its invading forces back from *** the front lines of the buildup leading to Operation Desert Storm,American troops began asking their families back home to shop local marine supply stores for commercial satellite navigation receivers and to mail the devices to them in the Middle East.A groundbreaking satellite constellation that the US military had been developing for decades to provide the nation's troops with global navigation data still lacked about a third of its full count of spacecraft.

关键词： stores Earth breaking

After Highflyer Crashes, Airborne Wind Energy Regroups

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第3期7卷 277-279页

作者： peter weiss Senior Technology Writer

In January 2020,a rumor from California in the United States reached researchers and entrepreneurs in Europe,a thriving hub for the small mostly trans-Atiantic field of engineering researdhand development called airborne wind energy(AWE):Alphabet,American tednology giant Google's parent company,was quietlyclosing down Makani,the AWE subsidiary it had nurtured into theworld's most advanced,visible,and well-funded enterprise designing and building tethered flying madhines-kites in AWE parlance-intended ultimately to produce megawatts of wind energy.

关键词： funded mostly designing

Pushing the Data Capacity Limit with Lasers on Silicon

在线全文

学校读者我要写书评

暂无评论

Engineering 2019年第5期5卷 824-825页

作者： peter weiss Senior Technology Writer

On 9 September 2016,global Internet data traffic flew past the milestone of 1 ZB,or 1021 bytes-a trillion gigabytes-per *** you imagine every one of those gigabytes as a brick,a trillion of them would allow you to build 258 Great Walls of China,one analyst estimated[1].It took nearly 40 years for the Internet to hit that *** 2022,annual Internet traffic is expected to reach almost 5 ZB[2].

关键词： Push Internet Silicon

Better Battery Management Boosts Electric Vehicle Prospects

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第8期7卷 1041-1043页

作者： peter weiss Senior Technology Writer

Vehicle makers worldwide are betting big on electric vehicles(EVs).With nations globally mandating sharp reductions in gasoline-powered transportation[1,2],most leading vehicle manufacturers,including Volkswagen,General Motors(GM),Honda,Daimler,Ford,Volvo,and Nissan—among others—have announced moves to make EVs only or to build them in significantly greater numbers[3–9].With rapid,international growth and standardization of charging infrastructure,technological improvements,favorable policies,and falling prices[2,10,11],EVs are approaching a critical *** it,their convenience(the ease of recharging their batteries when needed),range(on a fully charged battery),longevity(tied mainly to battery-pack lifetime),and performance are expected to pull ahead of equivalent metrics for comparably priced internal combustion engine(ICE)-powered vehicles.

关键词： Volvo battery Battery

Airborne Wind Energy Prepares for Take Off

在线全文

学校读者我要写书评

暂无评论

Engineering 2020年第2期6卷 107-109页

作者： peter weiss 不详

During a test flight off Norway’s coast,a team of wind-energy pioneers watched as what looked like a very big toy plane took off from the bobbing,jumbo-sized buoy to which it remained tethered(Fig.1).To safely land the nearly 2-ton[1],experimental drone back onto its floating base-station,the vehicle’s automatic flight control system would have to guide it through maneuvers that a wind-energy leader compared to“trying to parallel park a car with the curb shifting forward,backward,up and down”[2].

关键词： Wind backward shifting

CRISPR Use in Humans Shows Promise While Experts Weigh Ethical Concerns

在线全文

学校读者我要写书评

暂无评论

Engineering 2020年第7期6卷 719-722页

作者： peter weiss Senior Technology Writer

In November 2019,one of the first approved human trials of the gene-editing technology“CRISPR”reported dramatically positive results in each of the two initial patients given a single round of therapy[1].Both patients suffered from a painful,life-threatening,inherited blood disease and had received an infusion of billions of their own hematopoietic stem *** precursor blood cells had been altered with CRISPR to produce disease-free blood cells.

关键词： CRISPR Ethical Human

Welcome to the Global Navigation Multi-Constellation

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第4期7卷 421-423页

作者： peter weiss Senior Technology Writer

With the launch of a satellite in June 2020(Fig.1),China completed BeiDou("Big Dipper"),its global navigation satellite system(GNSS),a work-in-progress for the last 20 years[1].BeiDou’s fully operational debut coincides with the rapid buildup in the past decade of the European Union’s GNSS,Galileo,with 22 operational satellites at the close of 2020(Fig.2),as well as upgrades to Russia’s GNSS,GLONASS,which attained full operation over the last eight years after shrinking to only seven satellites in 2002[2].Now,after more than two decades of,for the most part,only the 24–31 satellites of the US Global Positioning System(GPS)serving as global reference points of position and time for terrestrial GNSS users planet-wide,these newer systems and upgrades have dramatically increased the density of coverage by navigation satellites of nearly every square meter of Earth.

关键词： terrestrial Earth planet

Pandemic Woes:Antigen Tests to the Rescue?

在线全文

学校读者我要写书评

暂无评论

Engineering 2021年第1期7卷 3-5页

作者： peter weiss Senior Technology Writer

On 26 August 2020,following unexpectedly strong,post-initiallockdown resurgences of coronavirus disease 2019(COVID-19)in the late spring and summer,the medical-manufacturer giant Abbott and the US federal government announced approval,for emergency use in public health efforts to control the pandemic,of a new diagnostic testing device the size of a credit card and costing only 5 USD apiece[1].Moreover,the federal government would spend 760 million USD to purchase 150 million of the tests and begin shipping them to nursing homes and schools roughly a month later[2].

关键词： Rescue approval Abbott

Charger Collaborations Power Global Electric Vehicle Expansion

在线全文

学校读者我要写书评

暂无评论

Engineering 2019年第6期5卷 991-992页

作者： peter weiss Senior Technology Writer

Kansas City, Missouri, is not a place most Americans would consider a trend setter. But amid surging global enthusiasm for electric vehicles (EVs), this midsize city located in the middle of the continental United States is helping lead the charge. It owes its new reputation as the "EV Mecca of the Midwest" to its electrical utility Evergy (formerly Kansas City Power and Light Company), which joined forces in 2015 with EV charging station manufacturer ChargePoint to install 1000 publicly accessible chargers throughout the Kansas City area [1,2] (Fig. 1).

关键词： install Power Kansas