"Officials in Xilinshui, in the city of Baoding, Hebei
province, created the scannable [QR] code, which measures 227 m along each side, using about 130,000
Chinese juniper trees, Xinhua reported on Thursday. The evergreen trees, which are native
to northeast Asia, are all between 80 cm and 2.5 m in height. While difficult to
do, anyone who scans the greenery using a smartphone or tablet will be connected to the village's
public WeChat account for tourism ..."
"Revolutionary, tower-style computer chips could boost
microprocessor performance a thousand-fold. In the age of big data, cloud and the internet
of things, our thirst for computing power has never been greater. Many of our readers will
be familiar with
Moore's law, the observation that predicts a doubling of computing capability
every two years, as integrated circuits are packed ever denser with ..."
"As demand grows for more versatile, advanced robotics
and other technologies, the need for components that can enable these applications also increases.
Producing such components en masse has been a major challenge. But now, in ACS Applied Materials &
Interfaces, researchers report that they have developed a way to help meet this need by printing
electronics that can fold themselves into a desired shape. Creating small
electronic pieces with specific architectural designs can now ..."
"There, his new specimens joined his collection and
waited patiently as only rocks can until he could find
time to analyze them." -
Kat McGowan, "Where Did It Begin?" September / October 2017 Popular Science
"Chang Gung University and Episil-Precision in Taiwan
claim the first demonstration of in-situ silicon nitride (SiNx) gate dielectric aluminium
gallium nitride (AlGaN) barrier metal–insulator–semiconductor high-electron-mobility transistors
(MISHEMTs) on 6-inch silicon on insulator (SOI) substrates. The devices showed improved DC,
dynamic and radio frequency (RF) performance over the same structures grown on HR Si ..."
Maybe I'm just easily impressed by effective simplicity,
but I really like the Bluetooth homepage animation demonstrating the ubiquitous connectivity
theme of "mesh is here." Interconnecting
lines in the mesh moving in relation to all the nodal points is a great way to illustrate
the flexibility of the system. The one scenario the Bluetooth SIG doesn't show is how "mesh"
enables tracking of your movement, which can easily be correlated with cellphone activity,
credit card usage, etc. Surely the collective data would never be abused. If you're not doing
anything wrong, then there's nothing to worry about -- right? ...
"Building on a half century of unprecedented chip scaling
and technology innovation, DOD is going back to basics in an attempt to reseed a U.S. electronics
sector that has contributed mightily to the nation's economic and national security. The
Advanced Research Projects Agency put more skin in the game with a batch of program announcements
worth $75 million over the next year as part of its Electronics Resurgence Initiative (ERI)
launched in June ..."
"The Amateur Radio Club at Yale University (W1YU) was
the host for the 2nd annual
Collegiate Amateur Radio Initiative (CARI) forum at the ARRL New England
Division Convention, September 8–10, in Boxboro, Massachusetts. ARRL CEO Tom Gallagher, NY2RF,
who — in light of the increasing number of reactivated and newly formed radio clubs at colleges
and universities — has been a prime mover behind the League initiative, opened the session.
Four presentations by participating institutions followed. Sean Barnes, N3JQ, of Harrisburg ..."
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The LDMOUNT is ideal for pump and communication diode
lasers. The LDMOUNT from Wavelength Electronics is designed for optoelectronic modules
in a 14-pin butterfly package that require up to 5A. With integrated heatsinking, built-in
safety features, and easy connection to eight different high performance Wavelength controllers,
the LDMOUNT can be used in a variety of applications, mounted on an optics table or to a chassis ...
ConductRF's skill in the manufacturing of
Phase Matched RF Cable
Solutions is second to none. We have phase matched a diverse array of solutions from Low
Frequency RG and LMR Cables to more premium exotic cables up to 70 GHz. Flexible, conformable &
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low as ±0.2 °/GHz, many connector types, indoor & outdoor solutions. A broad base
of standard connectors and cables in stock, we turn solutions around fast ...
Each month (unless I forget) I post a list of articles
with advice on
career enhancement including tips on preparing resumes, conducting yourself properly at
interviews, getting along well with co-workers, handling a difficult boss, etc. I also
post links to polls and studies done on career satisfaction, pay rates, education and experience
levels, years in the field, etc. Those types of articles have been around since Johannes Gutenberg
invented the movable type printing press. In the 1970s, Popular Electronics ran a
series of articles titled "Opportunity Awareness" that offered such advice, much of which
in principle is still valid today. One of the biggest advantages you can give yourself ...
Glenn Robb, owner / engineer from Antenna Test Lab
Company sent me this very excellent whitepaper he just wrote titled "Circularly Polarized Antennas Explained, Without the Math." As promised,
his tutorial introduces the concept of circular polarization in electromagnetic waves and
then describes how he measures and reports results in a spreadsheet using automated antenna
positioning and frequency sweeping. Antenna Test Lab Co's evaluation service includes fully
circular polarization antenna evaluations at no extra charge. Practical antenna evaluations
with 2D or 3D patterns in hundreds of test directions (and frequencies) are available for
"Under development by an MBDA-led consortium which
includes Qinetiq, Leonardo-Finmeccanica, Arke, BAE Systems, Marshall and GKN the so-called
system will be a 50 kW class directed energy weapon designed for use on both land and
sea. Laser weapons have key advantages over traditional systems: the munition is potentially
unlimited, and it operates at the speed of light so the time from when you say "fire" to the
weapon hitting its target is more or less instantaneous. According ..."
Popular Electronics ran a monthly news roundup
feature titled, simply, "Communications."
Included were tidbits on CB, SWL, HAM, RTTY, FAX, TV, SSB, AM, FM, CW, and ISB. I know that
because those are the acronyms in the string along the perimeter of the page's title. This
particular column was chosen because of the weird-looking Elser-Mathes Cup that will commemorate
the 1st amateur radio 2-way communications between Earth and Mars." I thought it was an artifact
of some primitive tribe's religious rite, but in fact those are Martians in the carving, not
Earthly savages ...
I made the rounds of
employment advice websites and pulled out these useful ones for September. A rather strange
result is two articles written for Monster, one suggesting jobs for introverts and the other
for extroverts. The strangeness lies in how both list contain the same job types - not sure
if that was intentional or not.
Can Your Alma Mater Influence Lifetime Earnings?
How to Bargain for the Best Possible Salary
Resume Tips & Career Advice for Entry-Level Engineers
Quotas in the Workplace
Perceive the Workplace <more>
KR Electronics part number
3012-160 is a
160 MHz bandpass filter designed for Positive Train Control (PTC) applications. Encapsulated
for enhanced shock and vibration resistance, 50 Ω source and load, N(F) to N(M) connectors.
The filters are encapsulated/ruggedized for enhanced shock and vibration resistance. Thousands
are currently installed and operating successfully in the field with major rail companies.
Other frequencies and bandwidths are available ...
Amateur Radio Emergency Net Active in Wake of Mexico Earthquake
Apple Watch Has Connectivity Issues
Google Acquisition Rumors Heat up As HTC Halts Stock Trades
LTE-Enabled Smart Watches to Drive Wearables Growth
Enrollments, Budgets Fall at 'Social Justice Warfare' Universities
Industry Needs to Do More to Include Other Networks in 5G
Rethinking Aircraft Radar Surveillance
New Battery Coating Could Improve Smart Phones and Electric Vehicles
Hydrogen Power Moves a Step Closer
NASA Launch Operators Expect Minimal Delays from Hurricane Irma
Unions Putting Pressure on Silicon Valley's Tech Giants
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Reading this kind of article takes me back to my days
building prototype circuits as an electronics technician at Westinghouse Electric's Oceanic
Division in Annapolis, MD. It was without a doubt the best technician job I ever had. In fact,
working with über engineer Jim Wilson and a few others is what really drove my determination
to get an electrical engineering degree of my own. Laying out perf boards for resistors, capacitors,
inductors, LEDs, switches, etc., and soldering all the point-to-point connections, then testing
(and sometimes fixing miswirings) was a great gig. Drilling and labeling the project box with
the dry transfer rub-ons in an attempt to make everything look as "real" ...
Antenna Test Lab Co has evaluated countless antennas and RF transmitter
products. With a fully anechoic chamber, antennas can be quickly developed and RF products
refined and deployed. Mounting surfaces like drywall, glass, wood, and even curved metal
simulated automobile available. The price for a standard
2D or 3D field pattern plot is only $450 - for
a passive or radiating antenna. That is an incredible deal!
"Nut & Volts" is one of my favorite magazines because
of all the good project and theory articles presented in layman's terms. I have to read it
online nowadays because my print subscription ran out last year. This article by Matthew Bates
shows how to build a simple - but very functional -
charger for wirelessly charging appropriately fitted devices. It uses a PICAXE 08M2 microcontroller
to generate the 12 kHz signal, but you could substitute something else like a 555 timer
if you do not have the equipment to program the 08M2 ...
For the sake of avid cruciverbalists amongst us, each
week I create a new
crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics,
and other technical words. At least 10 clues in this puzzle with an asterisk (*)
are pulled from this past week's (9/11 - 9/15) "Tech Industry Headlines" column on the RF
Cafe homepage (see the Headline Archives page for help). Enjoy ...
"The fourth-tallest building in San Francisco continues
to sink after
sinking over 17 inches already. Engineers are working to quickly find
a solution to save the multimillion-dollar condos inside the building. One of the largest
luxury towers in the San Francisco area is rapidly sinking, and engineers don't know how yet
to fix the problem. Since being finished, the building has sunk 17 inches (43 cm) and tilted
14 inches (36 cm) toward the street. Millennium Tower is a high-rise luxury residential complex ..."
"Engineers at the University of California, Davis have
designed a new high-frequency electronic computer chip with amazing capabilities. The chip
has the potential to transmit tens of gigabits of data in mere seconds, and dramatically change
the course of information technology by making it faster, more streamlined, and far more effective
than current models. The chip is designed using a
phased array antenna system. The system takes energy from various sources
and funnels them into a single beam. The final product is a chip that operates at 370 GHz
with 52 GHz of bandwidth ..."