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Kent volunteer group prepares for communications emergencies - Kent Reporter

Kent volunteer group prepares for communications emergencies - Kent Reporter | KH6JRM's Amateur Radio Blog | Scoop.it
Kent volunteer group prepares for communications emergencies
Kent Reporter
The KCST (Kent Communications Support Team) is composed of more than 25 amateur radio operators dedicated to providing emergency communications support for the city of Kent.
Russ Roberts's insight:

This Washington State group of Amateur Radio operators is prepared to serve their community. They have the training, experience, and desire to help their neighbors in the event of an emergency.  If CERT training is available in your area, please take the courses offered.  Aloha de Russ (KH6JRM).

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KH6JRM's Amateur Radio Blog
Amateur Radio--news, analysis, discussion, and antennas
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TV Fool

Locate TV transmitters, choose antennas, look at coverage maps, and optimize your HDTV setup. Learn about digital TV and how to incorporate it into your home theater system. Rediscover over the air (OTA) TV. Looking for something more accurate than antennaweb?

Via David Hall
Russ Roberts's insight:

Thanks to reporter David Hal for sharing this useful tool.  According to the company marketing this calculator, "TV Fool" will analyze your location to determine which broadcast television signals are available in your area."  The tool will be most useful in "trying to troubleshoot reception problems."  Nice program.  Aloha de Russ (KH6JRM).

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Don't let the title of this handy tool "fool" you.  The TV Signal Locator is a useful device that will determine which broadcast tv signals are available in your area.  You can also determine signal strength for each broadcast, over-the-air tv signal you can receive.  Aloha de Russ (KH6JRM).

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Ham radio users could be vital resource in emergency: Group reforming in ... - Bradford Era

Ham radio users could be vital resource in emergency: Group reforming in ... - Bradford Era | KH6JRM's Amateur Radio Blog | Scoop.it
Ham radio users could be vital resource in emergency: Group reforming in ...
Bradford Era
Amateur radio, also known as ham radio, is a well-known hobby, but it can also be also a major public service.
Russ Roberts's insight:

This well-written article about emergency communications is slightly different from similar articles appearing in the press.  This time, emergency management personnel are looking for amateur radio operator, rather than the other way around.  McClean County, Pennsylvania Emergency Management Director Bruce Manning wants 30 amateur radio operators to join a special communications group that would support the county during disasters.  Manning says he's trying to revive an amateur radio club that went dormant about 2 years ago.  The new group organized by Manning would be assigned to emergency shelters located at schools and churches.  Those interested in joining McClean County's new emergency communications club should call Manning at (814)-887-5070.  Aloha de Russ (KH6JRM).

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From my Twitter feed: Antennas! - KB6NU's Ham Radio Blog

From my Twitter feed: Antennas! - KB6NU's Ham Radio Blog | KH6JRM's Amateur Radio Blog | Scoop.it
Richard GW1JFV @gw1jfv. Mr Cebik (W4RNL sk) Top 5 backyard multi-band wire antennas via N8SDR n8sdr.sopmcincy.org/images/Antenna… MW0IAN's avatar Ian @MW0IAN The versatile endfed VK3YE ...
Russ Roberts's insight:

Daniel Romanchik always has something interesting on his website. This time, Dan features three outstanding antenna designs for those amateurs who prefer to build their own antennas:

 

1.  L. B. Cebik's (W4RNL...sk).  "Top 5 backyard multiband wire antennas (excellent article).

2.  The versatile end fed VK3YE.

3.  FMW magnetic loop antenna by M0AJJ.

 

Anyone of these design would make a good addition to your antenna "farm".  Aloha de Russ (KH6JRM0.

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California Hams Activate to Support Shelter Communications Following Wildfire

California Hams Activate to Support Shelter Communications Following Wildfire | KH6JRM's Amateur Radio Blog | Scoop.it
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
Russ Roberts's insight:

California hams were kept busy 26-27 July 2014 as they provided communications service to local emergency managers and The American Red Cross, which responded to a fast-spreading fire in Tuolumne County.  Amateur radio operators supported communications  at a shelter in Groveland.  According to Tuolumne County ARES Emergency Coordinator Carl Croci (NI6Z),  hams set up a UHF/VHF cross-band system between the Red Cross Headquarters in Fresno, California and the shelter site in Groveland.  Amateur radio operators were able to stand down the following day (27 July 2014) after 20 hours of emergency communications service.  Aloha de Russ (KH6JRM).

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Ham Amateur Radio Antennas, 35' Crankup Tower laydown

Ham Amateur Radio Antennas, 35' Crankup Tower laydown | KH6JRM's Amateur Radio Blog | Scoop.it
US $799.99 Used in Consumer Electronics, Radio Communication, Antennas (Check out Ham Amateur Radio Antennas, 35' Crankup Tower laydown http://t.co/dDfiBM5KTO via @eBay #hamradio #ham #amateurradio)...
Russ Roberts's insight:

If  you're in the market for a crank-up tower, you may want to contact this seller.  The tower is located in Riverview, Florida.  Local pickup only.  As with any internet purchase, check out the seller and the condition of the merchandise before you buy.  Aloha de Russ (KH6JRM).

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Beyond GPS: Five next-generation technologies

Beyond GPS: Five next-generation technologies | KH6JRM's Amateur Radio Blog | Scoop.it

Several DARPA programs are exploring innovative technologies and approaches that could supplement GPS to provide reliable, highly accurate real-time positioning, navigation and timing (PNT) data for military and civilian uses and deal with possible loss of GPS accuracy from solar storms or jamming, for example.

 

DARPA Director Arati Prabhakar  said DARPA currently has five programs that focus on PNT-related technology.

 

Adaptable Navigation Systems (ANS) is developing new algorithms and architectures that can create better inertial measurement devices. By using cold-atom interferometry, which measures the relative acceleration and rotation of a cloud of atoms stored within a sensor, extremely accurate inertial measurement devices could operate for long periods without needing external data to determine time and position. ANS also seeks to exploit non-navigational electromagnetic signals — including commercial satellite, radio and television signals and even lightning strikes — to provide additional points of reference for PNT.

 

Microtechnology for Positioning, Navigation, and Timing (Micro-PNT) leverages extreme miniaturization made possible by DARPA-developed micro-electromechanical systems (MEMS) technology. These include precise chip-scale gyroscopes, clocks, and complete integrated timing and inertial measurement devices. DARPA researchers have fabricated a prototype with three gyroscopes, three accelerometers and a highly accurate master clock on a chip that fits easily on the face of a penny.

 

Quantum-Assisted Sensing and Readout (QuASAR) intends to make the world’s most accurate atomic clocks — which currently reside in laboratories — both robust and portable. QuASAR researchers have developed optical atomic clocks in laboratories with a timing error of less than 1 second in 5 billion years. Making clocks this accurate and portable could improve upon existing military systems such as GPS, and potentially enable entirely new radar, LIDAR, and metrology applications.

 

The Program in Ultrafast Laser Science and Engineering (PULSE) applies the latest in pulsed laser technology to significantly improve the precision and size of atomic clocks and microwave sources, enabling more accurate time and frequency synchronization over large distances. It could enable global distribution of time precise enough to take advantage of the world’s most accurate optical atomic clocks.

 

The Spatial, Temporal and Orientation Information in Contested Environments (STOIC) program seeks to develop PNT systems that are independent of GPS: long-range robust reference signals, ultra-stable tactical clocks, and multifunctional systems that provide PNT information between multiples users.


Via Dr. Stefan Gruenwald
Russ Roberts's insight:

Thanks to Dr. Stefan Gruenwald for this fascinating article.  According to Gruenwald, major changes are coming in the way we do GPS.  DARPA Director Arati Prabhakar said backup  plans are being made to keep the nation's digital network functioning after a "Carrington Event" super flare from the sun.  These changes will also affect the ARPS system used by amateur radio operators.  Prabhakar said DARPA is looking into these technologies:

 

Adaptable Navigation Systems.

Microtechnology for position, navigation, and timing.

Quantum-assisted sensing and readout (QUASAR).

The Program in ultrafast laser science and engineering.

The spatial, temporal, and overt information in contested environments  program.

 

Exciting times are ahead for the military, civilian industry, and even amateur radio operators.  Aloha de Russ (KH6JRM).

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VK9X returns to the air.

Activity expected between late July and Early August 2014.

Russ Roberts's insight:

Source: Southgate Amateur Radio Club.

 

A Japanese team will activate  Christmas Island (VK9X) and Cocos-Keeling Island (VK9X) between late July and early August 2014.  According to the Southgate Amateur Radio Club, "Activity will be a holiday style on 160-6 meters using CW, SSB, FM, RTTY, and PSK31."  Aloha de Russ (KH6JRM).

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$5 LED DC Volt Meter video

of While at the SEAPAC Ham Radio Hamfest Randy Hall K7AGE bought a couple of $5 LED digital volt meters

Read the full Southgate News story... (Amateur Radio - $5 LED DC Volt Meter video: While at the SEAPAC Ham Radio Hamfest Randy Hall K...

Russ Roberts's insight:

Check out htis video from Randy Hall (K7AGE) who used a couple of cheap LEDs bought at the recent SEAPAC conference to make a nifty LED digital volt meter.  Nice project. Aloha de Russ (KH6JRM).

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APRS RF Bluetooth Communications

This photo is of my Blackberry Z30 running APRSDroid, and they are communicating via Bluetooth with the tiny tnc you see attached to the back of the UV-3R.
Russ Roberts's insight:

Innovative and fascinating project by Jerry Clement (VE6AB). Jerry has an interesting site, loaded with excellent photographs and home brewed projects.  As you can gather from his site, Jerry chases storms and reports on local weather conditions for his province.  You can contact Jerry here:  stormchaser@shaw.ca.  Aloha de Russ (KH6JRM).

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Army MARS at the ARRL Convention: - eHam.net

Army MARS at the ARRL Convention:
eHam.net
... so backpack HF radios carried by U.S. troops, its whip antenna extended and ready for action.
Russ Roberts's insight:

Nice article by Bill Sexton (N1IN0), the Army MARS HQ Public Affairs Officer.  Bill reviews some of the activities Army MARS did at its booth at the ARRL Centennial Celebration in Hartford,Connecticut.  He provided an excellent description of the ALE (automatic link establishment) display at the convention, using the PRC-150 manpack HF radio.  For more information on Army MARS go here:

williamc.sexton@gmail.com.  Aloha de Russ (KH6JRM).

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Ultra-precise atomic clock will reveal if physical constants really are constant

Ultra-precise atomic clock will reveal if physical constants really are constant | KH6JRM's Amateur Radio Blog | Scoop.it

A second is always a second. Nevertheless, no clocks are so precise that they can measure the exact duration of a second. So even the most precise atomic clocks are 0.000000000000000001 seconds off each second. Over the course of a few billion years that equals one second.


A single second off over the course of a few billion years may sound like a very precise clock -- and in a way it is but scientists from the University of Copenhagen would like a clock that is even more precise.

 

So now the scientists are suggesting that the atomic clocks around the world be connected by light rays; creating one big network of atomic clocks.

 

This network would measure time more precisely than ever before.

“A more precise clock would lead to a number of new, interesting possibilities,” says Professor Anders Søndberg Sørensen of the Niels Bohr Institute who recently co-authored a proposal for an improved atomic clock that was published in Nature Physics.

 

With more precise clocks come more precise experiments, and with more precise experiments come new technological possibilities. The Global Position System (GPS) for instance, only became possible when a new clock was invented that was so precise that it could measure how long it took for a signal from a GPS transmitter on Earth to reach satellites in space. Similarly, researchers hope that a more precise clock will lead to new scientific possibilities – and solve the debate over whether constants of nature are really constant at all.


Via Mariaschnee, Dr. Stefan Gruenwald
Russ Roberts's insight:

Thanks to Dr. Stefan Gruenwald for this interesting look at time and how we track it.  The University of Copenhagen, Denmark is "suggesting the atomic clocks around the world be connected by light rays, creating a big network of atomic clocks."  University of Copenhagen scientists believe more precise measurement means more technological possibilities.  With better clocks, we might be able to answer the big question--"whether constants of nature are really constant at all."  Something to think about when you coordinate your time with WWVB/WWV.  Aloha de Russ (KH6JRM).

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Roger G3XBM's Amateur Radio Blog: KX3 antenna failure

Roger G3XBM's Amateur Radio Blog: KX3 antenna failure | KH6JRM's Amateur Radio Blog | Scoop.it
I read on the M1KTA blog that an antenna lead on one of his Elecraft KX3 units has failed. I know these have seen some harsh portable field use but I would not have expected this. I have owned an FT817 for close on 14 ...
Russ Roberts's insight:

Roger (G3XBM) doesn't think too highly of the Elecraft KX3 for field opeations.  Citing an earlier report by M1KTA (see earlier post ) concerning an antenna lead failure in the KX3, Roger says the "KX3 is overpriced...and not well built for field use."  Roger believes the cheaper Yaesu FT-817ND has more features and is preferred for "Harsh field use."  Roger also criticizes the KX3 for its "mess of leads, coming out all over the place....the FT-817 is neat, rugged and compact."  As you may have guessed, Roger prefers his Yaesu FT-817ND to other QRP rigs.  I think his criticism of the KX3 is a bit harsh.  Aloha de Russ (KH6JRM).

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M1KTA's QRP ham radio blog: Some antennas... and one of ...

M1KTA's QRP ham radio blog: Some antennas... and one of ... | KH6JRM's Amateur Radio Blog | Scoop.it
Some antennas... and one of SotaBeams Wirewinders. Now got the antennas all up. Had to put up the Union flag on the 10/12/25/17/20. Light house, 80m dipole (I can use almost vertical down too and bottom feed so it is a ...
Russ Roberts's insight:

Nice discussion from M1KTA on the kinds of antennas he uses during QRP operations.  His blog also contains a variety of interesting articles, including the Elecraft KX3, the W3EDP antenna, a review of the Chinese Rock Mite QRP transmitter, a look at the GY560 frequency counter, and a photo essay on a lightning strike.  Aloha de Russ (KH6JRM).

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Call to Action: Protect Your Association's Rules and Standards, Tell Your U.S. Representative to Oppose H.R. 4969 - CAI Government Affairs Blog

.@CAIsocial alerts on #HR4969, federal preemption of CC&Rs for HAM radio towers antennas http://t.co/XvedAzuTlG #HOA #condoHOA
Russ Roberts's insight:

And now, here's the other side of the debate on H.R. 4969--a measure that would allow more freedom for amateur radio operators to erect antennas and towers in HOA and CC &R controlled housing.  Michael Hedge claims passage of H.R. 4969 "may invalidate community association rules and architectural standards that govern the installation and use of amateur radio towers and antennas."  He adds that "homeowners who want to install a radio tower would NOT have to go through the architectural review process or follow existing community guidelines."  Hedge closing by saying, "The FCC has determined there is no compelling national interest to warrant contractual  agreements between private citizens."  Either way, please notify your Congress member of your feelings on this resolution. Aloha de Russ (KH6JRM).
 

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Poway council to select from antenna options Tuesday night - Pomerado Newspaper Group

Poway council to select from antenna options Tuesday night - Pomerado Newspaper Group | KH6JRM's Amateur Radio Blog | Scoop.it
Poway council to select from antenna options Tuesday night Pomerado Newspaper Group The two options were selected for further review by the council following a May 6 public hearing attended by a roomful of “ham” radio operators along with a few...
Russ Roberts's insight:

The Poway City Council will meet this Tuesday to consider ways to resolve a nasty antenna height problem in the community.  One option calls for only a building permit for antennas up to 65 feet and would cost $480. "Notice of the proposed use would be sent only to contiguous property owners."  The second option specifies that for antennas between 35 and 65 feet in height, the applicant would pay a fee of $1,300 to file for a "minor antenna permit."  The applicant, through the Poway City Council, would notify property owners within 500 feet.  The granting and dismissal of permit applications would be done at the staff level.  Dismissed permits could be appealed to the Poway City Council. This could be precedent setting case for amateur radio operators.  I have a strange feeling that the second, more costly fee option will be adopted by the city council.  This might be a good time to go "stealth mode."  Out of sight, out of mind.  Aloha de Russ (KH6JRM).

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Registration Remains Open for Global Amateur Radio Emergency ... - ARRL

Registration Remains Open for Global Amateur Radio Emergency ... - ARRL | KH6JRM's Amateur Radio Blog | Scoop.it
Registration Remains Open for Global Amateur Radio Emergency ...
ARRL
Online registration ends July 31 open for the 2014 Global Amateur Radio Emergency Communications (GAREC) Conference.
Russ Roberts's insight:

Online registration for the 14-15 August 2014 Global Amateur Radio Emergency Conference (GAREC) will close on 31 July 2014.  The conference will be held in Huntsville, Alabama in conjunction with the 16-17 August 2014 Huntsville Hamfest.  Aloha de Russ (KH6JRM).

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Same callsigns? | AmateurRadio.com

Same callsigns? | AmateurRadio.com | KH6JRM's Amateur Radio Blog | Scoop.it
One of the drawbacks of WSPR (currently) is you tend to get spotted, or spot, the same stations over and over again. I am even seeing the same stations being (RT @RigolHam: * Same callsigns?
Russ Roberts's insight:

According to Roger Lapthorn (G3XBM), one of the drawbacks of the WSPR mode is the small number of hams using the mode.  As a result of this limited community, "you tend to get spotted, or spot the same stations over and over again." Roger says that's mystifying because the mode is easy to use, works great under adverse conditions, and is perfect for QRP operations.  So, my fellow amateurs, get busy and giver Roger a few calls.  Aloha de Russ (KH6JRM).

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From Ham Radio to Blogging, from the Titanic to Gaza...Sorting Out the Facts

From Ham Radio to Blogging, from the Titanic to Gaza...Sorting Out the Facts | KH6JRM's Amateur Radio Blog | Scoop.it
Have you ever heard of Artie Moore?He was an amateur ham radio operator — pre-wireless wireless — whose first news scoop came in 1911 when he beat out all the professionals by intercepting a (From Ham Radio to Blogging, from the Titanic to Gaza...Sorting...
Russ Roberts's insight:

The strange, fascinating way communications technology has changed our perceptions of our world--from the reporting of the Titanic sinking in 1912 by pre-wireless pioneer reporter Artie Moore to the modern day disaster of a Malaysian airliner over Ukraine described  by the French photojournalist Jerome Sessini, who happened to be in the area at the time of the plane's loss.  His photos posted on the internet proved that the aircraft shot down was civilian and that the loss of the aircraft was no accident.  An interesting and somewhat frightening cautionary tale.  Aloha de Russ (KH6JRM).

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Mildura medium wave cw beacon will be off air for several months.

Required maintanence and antenna upgrade will keep popular beacon silent.

Russ Roberts's insight:

Source:  Southgate Amateur Radio Club.

 

The VK3FI 473 kHz cw beacon at Mildura in Western Victoria state will be off the air temporarily for maintenance and antenna upgrades.  According to VK3FI, the installation will include a new mast, new feeders, and the rack-mounting of equipment.  Once the improvements are made, the cw beacon should be a bit easier to copy.  Aloha de Russ (KH6JRM).

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Liechtenstein operation set for mid-September 2014.

Activity will run from 13 to 20 September 2014.

Russ Roberts's insight:

Source:  Southgate Amateur Radio Club.

 

Kasimir (DL2SBY) will be on-air from Liechtenstein from 13 September to 20 September 2014.. Activity will be from 80-10 meters, including 30/17/12 meters using CW, SSB, and RTTY.  He will upload the log into ClubLog.  QSL via the Bureau or direct to DL2SBY.  Aloha de Russ (KH6JRM).

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FEMA Administrator Calls Ham Radio “Resilient” - ARRL

FEMA Administrator Calls Ham Radio “Resilient” - ARRL | KH6JRM's Amateur Radio Blog | Scoop.it
TAGS: amateur radio, amateur radio community, amateur radio operators, ARRL National Centennial, ARRL President Kay, Centennial Convention banquet, Connecticut Convention Center, disaster communication, disaster ...
Russ Roberts's insight:

The working relationship between the American Radio Relay League (ARRL) and the Federal Emergency Management Agency (FEMA) was put on solid ground when FEMA Director Craig Fugate (KK4INZ) and ARRL President Kay Craigie (N3KN) signed a formal Memorandum of Agreement (MOA) on 18 July 2014 at the ARRL Centennial Convention in Hartford, Connecticut.  In signing the document, Fugate said, "Radio is one of the most resilient communications technologies we have...Amateur Radio can serve as a vital service in support of emergency responders and survivors during a disaster."  Aloha de Russ (KH6JRM).

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Amateur Radio Contests Encourage Emergency Preparedness

Amateur Radio Contests Encourage Emergency Preparedness | KH6JRM's Amateur Radio Blog | Scoop.it
100 years ago, amateur radio operators were in the early years of making wireless communication with people around the world.
Russ Roberts's insight:

A nice written and audio package assembled by Iowa Public Radio reporter John  Pemble. Pemble visited the Story County Radio Club during the 2014 ARRL Field Day and came away with a new understanding of what "contesting" means.  Love 'em or hate 'em, contests prepare you to handle loads of traffic in a short period of time.  For me, Field Day provides all the contest excitement I need.  Somehow, I survive the 24-hour "send-a-thon".  I have a firm respect for contesters who can endure the stress and excitement without giving up.  Aloha de Russ (KH6JRM).

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Christofer Toumazou's 'lab on a chip' makes preventing illness possible

Christofer Toumazou's 'lab on a chip' makes preventing illness possible | KH6JRM's Amateur Radio Blog | Scoop.it

The Chairman and CEO of DNA Electronics, a provider of point-of-care genomic diagnostics solutions for medical and healthcare applications, Chris Toumazou, has been awarded the European Inventor Award 2014 in the Research category, for his rapid USB-based  DNA testing device.


Announced at the European Inventor Awards ceremony in Berlin on June 17th 2014, Toumazou’s win recognises his contribution to medical research with his ground-breaking invention. The device, which can show the results of a DNA test within minutes, uses silicon transistors to identify DNA and RNA, offering a simpler, cheaper and more discrete alternative to existing DNA analysis equipment.

 

The invention involves the amplification and detection of DNA and other biomolecules using pH measurement, providing the ground work for DNA Electronics’ molecular diagnostics platform Genalysis®. With the capability of identifying genomic sequences, not only in patients, but also in infectious agents, the company is developing products   that will provide clinicians with rapid actionable diagnosis of life-threatening conditions.

 

DNA Electronics is a developer of semiconductor solutions for real-time nucleic acid detection which enables faster, simpler and more cost-effective DNA analysis platforms.


A spin-out of Imperial College London, DNA Electronics was founded by Professor Toumazou following his invention of the company’s core technology that allows CMOS transistors to be switched on and off with DNA – the key invention enabling semiconductor-based sequencing.   Prof. Toumazou’s innovation has culminated in the world’s first DNA logic on standard CMOS technology.

 

The company’s IP portfolio includes techniques for monitoring nucleotide insertions using ion-sensitive transistors, enabling label-free electronic DNA sequencing and diagnostics platforms. DNA Electronics (DNAe) has developed the ground-breaking Genalysis® platform of disposable silicon chip-based solutions for real-time nucleic acid sequence detection at the point of care, providing end users with technology as yet unavailable outside a laboratory.

 

DNA Electronics has a non-exclusive, field-limited licensing agreement with Ion Torrent (now part of Thermo Fisher Scientific), whose next generation sequencing technology is based on DNA Electronics’ semiconductor sequencing IP. DNA Electronics has also licensed its Genalysis® technology platform to GENEU™, a company that is delivering on-the-spot genetic analytics services for cosmetics and skincare applications.

 

For more information: http://www.dnae.co.uk


Via idtdna, Dr. Stefan Gruenwald
Russ Roberts's insight:

The remarkable new diagnostic tool can show the results of a DNA test within minutes.  The device uses silicon transistors to identify DNA and RNA, and can serve as a cheaper, faster alternative to existing DNA test equipment. Here's a perfect example of thinking "out of the box" to solve a major healthcare issue.  Aloha de Russ (KH6JRM).

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SKYWARN WARRIORS: Local ham radio buffs work front lines for National Weather Service

SKYWARN WARRIORS: Local ham radio buffs work front lines for National Weather Service | KH6JRM's Amateur Radio Blog | Scoop.it
The National Weather Service has radar, satellites, Doppler, and double Doppler.
But even with all of that high technology, it still needs boots on the ground to know how the weather is affecting people.
Russ Roberts's insight:

An excellent public relations article by reporter Jack Minch, highlighting the contributions of amateur radio operators who are SKYWARN observers for the National Weather Service.  National Weather Service meteorologist Glenn Fields says, "A lot of our reports do come from amateur radio", adding that "Ham Radios are good because they are battery powered and it doesn't matter if the electricity goes out in a storm."  This is another example of amateur radio operators helping their community in times of natural disaster. Aloha de Russ (KH6JRM).

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Copasetic Flow: Standing Wave Ratio, or SWR, A Ham Radio Exam ...

Copasetic Flow: Standing Wave Ratio, or SWR, A Ham Radio Exam ... | KH6JRM's Amateur Radio Blog | Scoop.it
The amount of energy reflected is determined by how well the impedances of the antenna, the transmission line, and the transmitter match. The reflected rf energy can enter the transmitter and damage the final radio frequency ...
Russ Roberts's insight:

A nice, compact review (with questions) of the standing wave ratio (SWR).  This brief guide will help aspiring amateur radio licensees understand the working of SWR.  Hamilton Carter (KD0FNR) reviews SWR test questions and highlights  the correct choices.  A good, general review for taking the Technician Class Amateur Radio License.  Aloha de Russ (KH6JRM).

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