Shortwave IT!

Friday, Jan 17th

Last update09:17:41 AM GMT

Shortwave

Which Climates Are Best for Passive Cooling Technologies?

A group of University of California­, San Diego researchers set out to gain a better understanding of the thermal balance of power plants and surfaces, like heliostat mirrors or solar panels, when exposed to both solar (shortwave) and atmospheric (longwave) radiation.

Which climates are best for passive cooling technologies?

Credit: Carlos Coimbra. WASHINGTON, D.C., June 25, 2019 -- A group of University of California, San Diego researchers set out to gain a better understanding of the thermal balance of power plants and surfaces, like heliostat mirrors or solar panels, when exposed to both solar (shortwave) and atmospheric (longwave) radiation.

Certain climates are better suited for passive cooling technologies

have investigated the role that cloud cover and relative humidity play when surfaces such as solar panels are exposed to shortwave and longwave radiation. To identify the exact role water plays, the team needed to determine how much heat can be rejected to outer space and how much is radiated back by the atmosphere.

Summer Heat & Storms to End the Weekend

CHARLESTON, S.C. (WCSC) - We’ll wake up rain-free on Sunday morning, but a bit of shortwave energy could bring us a few scattered afternoon/evening thunderstorms. Sunday afternoon highs will hover in the lower 90’s once again with a mixture of clouds and sunshine.

Breezy northerly winds and increasing fire weather concerns next week

June 14, 2019 – Cooling trend into Saturday, but more hot weather returns early next week. Isolated afternoon and evening thunderstorms will be possible over higher elevations of the Sierra Nevada through Monday. Discussion. The upper level shortwave which brought some thunderstorm activity in the....

HCMC earmarks $7 million to fight illegal sand mining

The city will set up two sentry posts along the coastal area off its outlying district of Can Gio and two others along the Dong Nai River in District 9. The four posts will be equipped with hi-tech military shortwave radios as well as marine radar system with Automatic Radar Plotting Aids (ARPA)....

HCMC earmarks $7 million to fight illegal sand mining

Ho Chi Minh City will set up two sentry posts along the coastal area off its outlying district of Can Gio and two others along the Dong Nai River in District 9. The four posts will be equipped with hi-tech military shortwave radios as well as marine radar systems with Automatic Radar Plotting Aids....

Amatuer radio operators prep for emergencies

Thursday morning local amateur radio operators talked to people on radios in New Hampshire, Maryland, North Carolina and in other states. They say they did this to help them prepare for emergencies. Mike Coslo is the President of the Nittany Amateur Radio Club in State College.

The Red Cross teams up with local amateur radio operators

The Red Cross says that during a disaster, they actually seek help of radio operators, to help as many people as possible. The Red Cross says with start of hurricane season on June first, they're partnering with the amateur radio relay league and the Nittany Amateur Radio Club.

'We should get the hell out of here': Ex-diplomat recalls mission to rescue students in Chornobyl disaster

In the spring of 1986, Hector Cowan, a 38-year-old diplomat at the Canadian embassy in Moscow, got a first clue about the Chornobyl nuclear accident while at the breakfast table, with his wife, Hilda, and three young children. He was listening to the BBC news on a shortwave radio.

Building checked in threat response

Police in Northwest Arkansas responded to a bomb threat against a federal building Tuesday after a person heard the apparent threat while listening to his shortwave radio, officials said. Fayetteville police dispatch logs show that officers responded about 11:45 a.m. to the John Paul Hammerschmidt Federal Building at 35 E.

Remote Sensing, Vol. 11, Pages 1130: Satellite-based Cloudiness and Solar Energy Potential in Texas and Surrounding Regions

Abstract Global horizontal irradiance (i.e., shortwave downward solar radiation received by a horizontal surface on the ground) is an important geophysical variable for climate and energy research. Since solar radiation is attenuated by clouds, its variability is intimately associated with the variability of cloud properties.

Listen to Dateline Pacific for 10 May 2019

Efforts to refloat a stricken ship in Solomon Islands finally get underway; British MPs debate West Papua; Hopes a new Australian broadcasting boss will restore Pacific shortwave; Chinese investment in Micronesia stirs concern; And, an award-winning Samoan-New Zealand artist is on show. Get the RNZ app.

Review: SDR Hands-on Book Jan Buiting | May 7, 2019 Author Burkhard Kainka’s inspiring Foreword in the book I’m reviewing here has important clues as to why software defined radio (SDR) is a hit not only among existing radio amateurs. SDR has proven to be

Author Burkhard Kainka’s inspiring Foreword in the book I’m reviewing here has important clues as to why software defined radio (SDR) is a hit not only among existing radio amateurs. SDR has proven to be a great promotion tool for the declining radio hobby in general.

Remote Sensing, Vol. 11, Pages 1059: Real-Time Uncertainty Specification of All Sky Imager Derived Irradiance Nowcasts

Abstract The incoming downward shortwave solar irradiance is harvested to an increasing extent by solar power plants. However, the variable nature of this energy source poses an operational challenge for solar power plants and electrical grids. Intra hour solar irradiance nowcasts with a high....

Portland metro Friday weather: Clear, dry, and warm with a high of 71 to end the week

Changes are in the air for Sunday as a weak shortwave system drops down from the British Columbia coast and will strengthen the onshore flow from the coast. The valleys should still be mostly sunny and pleasant, but the highs will drop back down to 70 degrees. The Portland metro area will generally feel the drops in temps.

A Primer on IR Imaging Technology and Applications

Infrared imaging is a powerful technology for many uses, including security, industrial monitoring, and science, but the uses and results depend on the band chosen. This webcast presented by Laser Focus World contributing editor Jeff Hecht will explain the three primary IR bands: near/shortwave....

Review: SDR Hands-on Book April 30, 2019

Author Burkhard Kainka’s inspiring Foreword in the book I’m reviewing here has important clues as to why software defined radio (SDR) is a hit not only among existing radio amateurs. SDR has proven to be a great promotion tool for the declining radio hobby in general.

Russia deploys electronic warfare systems in Kaliningrad to control Europe

According to the General Staff of the Russian Navy, the system entered service at the Baltic Fleet at the end of 2018, where it was subsequently put to test during naval exercises. Military experts believe that the performance of the Murmansk-BN system will make it possible to jam radio signals on a large area.

In Eritrea, Jailed Journalists Continue to Languish

WASHINGTON Yirgalem Fisseha will never forget the moment her world turned upside down. On February 19, 2009, Yirgalem, a poet and journalist, was working her shift at Radio Bana, a station in Asmara, Eritrea. Suddenly, at 4 p.m., Yirgalem and her colleagues were ordered to an impromptu meeting.

In Eritrea, Jailed Journalists Continue to Languish

WASHINGTON — Yirgalem Fisseha will never forget the moment her world turned upside down. On Feb. 14, 2009, Yirgalem, a poet and journalist, was working her shift at Radio Bana, a station in Asmara, Eritrea. Suddenly, at 4 p.m., Yirgalem and her colleagues were ordered to an impromptu meeting.

Radio Piracy on the High Seas: Commercial Demand for Taboo Music

. The true story of pirate radio is a complicated fight over the airwaves. Maybe you have a picture in your mind of some kid in his mom’s basement playing records, but the pirate stations we are thinking about — Radio Caroline and Radio Northsea International — were major business operations.

Shaming ‘Lakers’ for tuning to ‘shortwave’

By Peter Muthamia. Folks born and brought up in Katerero where I, the poor son of this rat and roach-infested Uswaz, was born, along with the larger shores of Lake Victoria are indeed interesting lot. Any time they flock together they divert to their “short wave”.

MIL-Evening Report: Sylvester Gawi: Deplorable neglect of PNG’s ‘voice of the nation’

COMMENTARY: By Sylvester Gawi in Lae I grew up in the 1990s listening to NBC Radio – Radio Kundu – which was informative and always reaching out to the mass population of Papua New Guinea who can afford a transmitter radio. From entertaining stringband tunes, toksave segments and nationwide news....

Maha Billiards: Pherwni, Badami march into semis

Top two-ranked cueists Sparsh Pherwani (-300 handicap) and Hasan Badami (-270 handicap) won their respective quarter-final matches of the BSAM-Maharashtra Challenger Tour ( 2019) here Friday. The top seed Pherwani of Khar Gymkhana halted the fine run of Radio Club's Neville Razmi (-100) by coasting....

Telecommunications Pocket-sized VLF antenna keeps comms open where conventional radios fail

The US Department of Energy's SLAC National Accelerator Laboratory has developed a compact antenna that can transmit radio signals not only over long distances through the air, but also underwater, and even through solid earth. The new four-inch (10-cm) antenna exploits the piezoelectric effect to....
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